An issue was discovered in Suricata 5.0.0. It was possible to bypass/evade any tcp based signature by faking a closed TCP session using an evil server. After the TCP SYN packet, it is possible to inject a RST ACK and a FIN ACK packet with a bad TCP Timestamp option. The client will ignore the RST ACK and the FIN ACK packets because of the bad TCP Timestamp option. Both linux and windows client are ignoring the injected packets.
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Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2020-01-06T20:09:13
Updated: 2024-08-05T01:54:14.538Z
Reserved: 2019-10-29T00:00:00
Link: CVE-2019-18625
Vulnrichment
No data.
NVD
Status : Analyzed
Published: 2020-01-06T21:15:11.427
Modified: 2023-02-01T19:24:01.150
Link: CVE-2019-18625
Redhat
No data.